Instrument mounting



2 Sheets-Sheet l C. A. BOEHM INSTRUMENT MOUNTING Dec. 26, 1950 FiledDec. 6, 1949 INVENTOR.

cum. I]. BOEHM BY 7m. FM mm/4 M HTTURNEYS Dec. 26, 1950 c. A. BOEHM2,535,889

INSTRUMENT MOUNTING Filed Dec. 6, 1949 2 Sheets-Sheet 2 Fig.8

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VII/1111M 5 Patented Dec. 26, 1950 UNITED STATES PATENT OFFICE 11Claims.

This invention relates to improvements in instrument mountings and hasparticular reference "to an improved mounting for a thermopile or likecontrol unit part'cularly adapted for utilization in connection withheat treating or like machines.

One of the objects of the present invention is the provision of animproved universally adjustable control head for utilization inconnection with a heat treating machine.

A further object of the invention is the procompact adjustableinstrument supporting structure having a minimum of exposed partssubject to deterioration from heat and flame, and which will adequatelyprov'de for operating coupling of cooling, clearing, and electricalcontrol media with the head in a manner to insure efiicient operationthereof.

Other objects and advantages of the present invention should be readilyapparent by reference to the following specfication, considered inconjunction with the accompanying drawings forming a part thereof, andit is to be understood that any modifications may be made in the exactstructural details there shown and described, with'n the scope of theappended claims, without departing from or exceeding the spirit of theinvention.

, Figure 1 is a fragmentary view of a machne showing the utilization ofthe invention in connection therewith.

Figure 2 is an enlarged plan view of the instruction head with partsbroken away.

Figure 3 is a vertical sectional view on the line 3-3 of Figure 2.

Figure 4 is a vertical section on the line 4-4 of Figure 2.

Figure 5 is a similar section on the line 5-5 ,of Figure 2.

Figure 6 is a cross section of the support ng arm indicating therelationship of the several conas on line 6-6 of Figure 2. a

Figure 7 is a longitudinal sectional view on th line 'l-'l of Figure 6.

Figure 8 is a section on the line 8-8 of Figure 2, and

Figure 9 is a transverse section of the lower end of the head in a planeindicated by the section line 9-9 of Figure 5.

The present invention relates to an instrument supporting headparticularly designed to efiect location of a thermopile or like controlunit ID in proper relationship to a work support, such as H of a heattreating machine having a frame designated as an entirety by the numeralI2.

The specific detail of the machine forms no part of the presentinvention, but a characteristic form is illustrated, for example, incopending application of Strauchen et al., Serial No. 755,944 filed June20, 1947, which is now Patent No. 2,523,- 883, granted September 26,1950. As is conventional in machines of this general type, a work pieceto be operated on may be mounted on the spindle II where it is subjectto a suitable heating action performable by controlled flame jets or thelike (not shown) directed against the work..

It is the purpose of a viewing or controlling instrument to determinethe nature of reaction produced on the work, and, if des'red, to effectautomatic control of the heating or reacting medium. For this purpose, asuitable sensitive thermopile or similar device In, which may be in theform of a rayotube, is employed. This device is located in the socket ormounting l3 and is provided with the electrical terminals as at Mcoupleable through the wires IS in conduit ['6 with a suitable recordingor controlling mechanism (not shown).

The present invention relates primarily to the means for support'ng thecontrol unit in proper proximity to the work piece during heat treatingor like operations. For this purpose, there is provided a supportinghead having a body portion I! formed with a recess or seat as at Hi :toreceive the unit l3 and having depending therefrom the tapering nozzleportion l 9 providin the central viewing passage 20. The member l9terminates in an inturned flange 2! providing the guide rib 22 havingseated aganst one face the target disc 23 formed with the elongate orother desired shape of viewing aperture 24. On the opposite face of therib a washer 25 secured as by screws 26 to the member 23 rotatablymounts the target disc on the rim, permitting of its angular rotation asdesired according to the particular plane or area of the work it isdesired to view, while the amount oi tightening of screws 26 servesfrictionally to vary the ease of rotation of the target or to lock thesame in position when greater permanence of location thereof is desired.

The body portion is provided with a flared annular portion 2'!constituting the upper part of the head and is additionally providednear its lower end'witha peripheral rib or flange 28. This flange, asparticularly illustrated in Figure 9, is provided with a notch oraperture at 29 to receive the lower end of the coolant injecting tube 30which extends through the flange into .the space 3|. A second notch oraperture 32 formed in the flange 28, and illustrated asvlocatedadiametrically opposite the point also'provides communication betweenthe areas circumscribing the nozzle 19 at opposite sides offiange 28.

An enclosing sheath or sleeve, preferably of brass or other light weightmaterial, which=can be readily drawn or formed has a portion as at35:;shaped' to-closely interfitwithand be secured as by brazing or thelike to the portion 21 .of the bodyf .the'head and extends in spacedrelation to the nozzle portion I9 to provide the annular coolant chamber36. V

In continuation, it interfits with 'the flange 28 and is terminallysuitably securedto the endof the, nozzle portion [9, providing ,aclosure; as well for the coolant chamber 3 I.

For mounting of thevunit, themember I?! .is provided-atone side withthe. bracket lugs 31 Eand38 connected .by the pivot 39 with tongue 40 of.the end block or bar-portion 4| ,of the oven arm42. Thistongue isprovided withgsuitably flattened sides for interfitting engagement withthe members 31. and 38. i

--Adjustably secured tothebed unit i201? the machine by. bolt-43 is abracket 44'havingia :furcated portion 45 to which-isgpivoted'sleeve46re- 'ceiving the overarm 42 in amannerto permitof .rotative andlongitudinal adjustment of theparm. Al-bolt 41 serves to clamp theoverarminidesired .adiustedzposition.

particularly illustratedin Figures 6..and7, the overarm includes aninner tube or-s'leeve 48 telescoping at :one :end" with the block M .andinterfitting atathe other withthe cap 49.

:Surrounding the sleeve at its ends are thesspacing' rings .50 and.which, in w-turn,:suppor-t: the

outer-sleeve 52. These parts are preferablyssecured together "as bywelding ior"brazing'and'iprovide intermediate the 'sleeves'th'e coolantreceiving space or chamber '53. Extending through the cap 49 at one sideis the coolant input pipe 54 threaded as 'at 55 intothe-tapered'lportion .oithe coolant passage '56 in'block 4'l and 'havingits opposite end projecting as at 51 to-rece'ive the flexib'le conduit58 connected with a suitable source of water or other cooling medium byway-of elbow '80 and pipe 8|.

' Threaded into the-sideoffblock M is the co'nhector nipple 59'fromwhich loops upwardly-a 'flexible'conduit 60 connected bynipple 6| topassage 62 'in the (upper portion'ofthebody member "H. 'The'passageBZ isintermediately blocked as by pipe plug 63 while the bracket lug 38 hasthe respective transverse passage 64, verticalpassage 65, andreverselyextending passage 66 formed therein in circumscribing relationto the pivot 39 so that incoming cooling liquid will circulate throughthe passages, and around the pivot, tending to minimize heating ofthe'lu'g 38 when "the instrument is in use. The passage 62'has a reducedcontinuation-61 below plug 63 in'communicationwith thepass'age 66 "andhas fitted therein the coolant injecting tube '36-which, 'asprevi- 4ously pointed out, extends to the space 3| below the rib or flange 28.The injected coolant will therefore flow from the supply pipe throughthe circumscribing chamber of the overarm 42 and passages or conduits asdescribed to the lower or work approximating portion of the instrumentholder, creating liquid pressure at that point.

This introduction of liquid will force the fluid upwardly through notch32 in the flange and the "annular coolant chamber 36 for dischargethrough passages 68, 69, I0, H, and i2, nipple l3, and discharge conduit14.

It. will be noted'th'at the passages 68 to 12 inclusive are formed inthe member 31 in a manner similar to the "passages 62 to 6'! in the lug38, thus circumscribing the pivot 39 and cooling this portion of themounting at the opposite side. The conduit 14 is connected to nipple 75carried by the block 4| and the return coolant flow is through passage16 .in the block, the coolant chamber. 53 of theoverarm,dischargepassage l1 and nipple '58 mounted on cap plate 49. Nipple l8provides the attachmentfor the second flexible coupling 19 which mayreturn the coolant to a suitable reservoir.

. In thismanner a free continuous flow of coolant may be efiected fromsupply to exhaust which flows interiorly through the overarm and directto the area of the instrument supportsubjected to greatest heatand'thence by way of the coolant chambers .on the-exterior of -.theinstrument support and the pverarm to prevent excessive heatin of theseparts. While it is understood that the members 66 and 14 may occupydifferent relationships than those shown, it is preferred that they bein the form of arches or loops as shown, permitting various angularadjustments of the support head about the pivot 39 witha minimum ofdistortion fiexing or displacement of the conduits and at the same timepositioning them as remotely aspossible from the sourcerof heat when themachine towhich the attachment is applied is beingutilized iorheat.treatingoperations.

For accuracy ofiop'erationofthe member 13in checking or controlof thefunctioning of the machine it is necessary that the nozzle portion ofthe viewing tube be maintained clear of spray, dirt or other foreignsubstances which might dele-. teriously effect the accuracy of readingas respects the radiant heat conditions existing'atthe work.

Foraccomplishmentof this result, utiliza-tioniis made of arclearingblast of airintroducibleinto the nozzle adjacent the lens or receivingportion 82 of the device I-(lthrough the discharge passage 83. Thispassage .isrcoupled-bya vertical passage 84 formed in the body I?connected by a cross passage 85 with :an additional transverse passageor there 86 formed in the outer portion of the log 31 and terminating inthe pivot pin receiving aperture88 thereof. Thepin or pivot 35Jis formedwith the-annular connecting groove 89 and is .interdrilled to provide alongitudinally extending or axial passage i-lil'which, .in'turn, isconnected by the cross Jdrilling '9! withza second annular groove 92.This latter groove is so located 'a'sto register with passage 33 formedin the block 4! which terminates in a threaded socket to receive one endof the air pipe or tube 94 which ina manner similar to thetube'or pipe54 extends longitudinally through the space contained Within the overarm42 and beyond cap '49 for connection with a suitable source-ofcompressed air (not shown). The member 4| is further p'roVided withanaddi aaaaaae' tioiial conduitpassage 95 correspondingly "era videdwith a tube 95 extending from'the mem-- tangling or physical injury, andadditionally-t6 a maximum feasible degree is insulated against, due heatreaction by the coolant circulat n through the adjacent instrumentsupportin' ing and the circumscribing water jacket of th main portion ofthe overarm.

' From the foregoing it will be evident that-win utilization of theinstrument supporting unit r mounting of the present invention thedevice as an entirety may be readily located upon the machine inconnection with which it is to be utilised and the general angular andin and out positi'ning determined by suitable adjustments of the overarmwhile particular angular relationship :of the head itself arecorrespondingly eflected by tilting movement about the pivot 39 whilethe field of view or reaction area is determined by a rotation orangular adjustment of the target screen.

At the same tim the interior of the nozzle or signal receiving portionof the instrument is given maximum cooling efiect by a surrounding watercirculation jacket and an interior clearingfblast and that this iseffected substantially in its entirety through contained cooled andprotected conduits and passages formed in the supporting arm andinstrument head itself without interferences due to various angularadjustments; ,;and that a minimum of exposed connections subject to heator other possible harmful conditions are employed.

It will further be noted that the head of the supporting arm is providedwith a kerf or slot 91 aligned with the terminus of the passage 95 andwith the aperture or passage 98 in the upper portion of the body I! ofthe instrument supporting head. The wire containing conduit 18 extends,as indicatedin Figures 2 and 3, through thief-passage 95 adjacent thepivot IE to the instru ent H, the kerf providing sufficient space forswinging of the conduit during pivotal adjustment of the head. 1 1?.

In addition, it will be noted that to assist-in protecting the generalpivotal connection between the arm and the head itself there has beenprovided the heat deflecting plate or pan 99 secured as by bolt gl flllto the underside of the lugs 31and 38, thus forming protection to thisgeneral area as well as to the upwardly looped conduit elements 60.

What is claimed is:

1. An instrument support of the character described including a head, asupporting arm therefor, said head and said arm having conduit passagesformed therein, and a pivot interconnecting said parts, said pivothaving axially spaced circumferential grooves respectively aligned withthe passage of the arm and the passage in the head and an axiallyextending passage interconnecting the grooves whereby continuousconnection is provided between the passages in the head and arm for anyrelative angular adjustment of the parts about the pivot.

2. An instrument support of the character described, including asupporting arm having a head portion and a cap portion, spaced telescoping sleeves including an inner sleeve member interconnecting the headand the cap members, a second sleeve member surrounding the first inspaced relation thereto to provide a chamber, said head having conduitpassages formed therein, a first conduit member extending interiorly ofthe inner sleeve and coupled with one of the passages in th head, asecond conduit member coupled with the chamber between the sleeves, theinner sleeve being formed with an orifice providing communicationbetween said chamber and the other of the passages in the head, aninstrument supporting head pivoted to the head portion of the supportingarm having a coolant chamber formed therein, and means coupling thepassages in the head portion of the arm with the coolant chamber atspaced points to provide circulation of coolant in the chamber by way ofsaid passages.

3. An instrument support of the character described. including asupporting arm having a head portion and a cap portion, spacedtelescoping sleeves including an inner sleeve member interconnecting thehead and the cap members, a second sleeve member surrounding the firstin spaced relation thereto to provide a chamber, said head havingconduit passages formed therein, a first conduit member extendinginteriorly of the inner sleeve and coupled with one of the passages inthe head, a second conduit member coupled with the chamber between thesleeves, the inner sleeve being formed with an orifice providingcommunication between said chamber and the other of the passages in thehead, an instrument supporting head pivoted to the head having a coolantchamber formed therein, means coupling the passages in the head with thecoolant chamber at spaced points to provide circulation of coolant inthe chamber by way of said passage, means dividing the chamber in theinstrument head into upper and lower portions, and a conduit memberdirectly connecting one of the passages in the head with the lowerportion of the chamber for directly injecting coolant into said lowerportion of the chamber.

4. An instrument support of the character described, including asupporting arm having a head portion and a cap portion, spacedtelescoping sleeves including an inner sleeve member interconnecting thehead and the cap members, a second sleeve member surrounding the firstin spaced relation thereto to provide a chamber, said head havingconduit passages formed therein, a first conduit member extendinginteriorly of the inner sleeve and coupled with one of the passages inthe head, a second conduit member coupled with the chamber between thesleeves, the inner sleeve being formed with an orifice providingcommunication between said chamber and the other of the passages in thehead, an instrument supporting head pivoted to the head having a coolantchamber formed therein, means coupling the passages in the head with thecoolant chamber at spaced points to provide circulation of coolant inthe chamber by way of said passage, means dividing the chamber in theinstrument head into upper and lower portions, and a conduit memberdirectly connecting one of the pas sages in the head with the lowerportion of the chamber for directly injecting coolant into said lowerportion of the chamber, said dividing means having an additional passageformed therethrough providing communication between. the

fitting -.engagement with the terminus 0f- -th.e

nozzle whereby annular coolant chambersare provided intermediatetheanozzle portion 110i {the head and thecircumscribingsleeverbnsopposite sides of the rib, said rib having apair of aper tures formed therethrough,providing communication betweensaidchambers, a coolant injector,-

tube extending by way of one of the chambers through an aperture in theribia'nd communicating with the other'ofthe chambers, afirst con-. duitmeans-coupled by way of .the headto said tube-and a second conduit meanscoupled by :way ofithe head to the otherrohaznber whereby-continuouscoolant circulation may be effected through the respectiverchambers.

6. vAn instrument mounting including a supporting head havinga bodyportion provided with an interior instrument receiving seat anda com,municating viewing .tube, :said head having a tapered nozzle portionformingthe outer wall of.

the viewing tube, said .nozzlebeing interiorly.

formed near the terminus thereof with an outwardly extendingperipheralrib, a tapered sheath.

member circumscribing the body portion of the head and extendinginspaced surrounding relation to the nozzle portion of the body, saidsheath.

interfitting with the rib on the nozzleand having a portion extendingtherebeyondiniintere fitting engagement with the terminus of the nozzlevwhereby annular coolant chambers are provided intermediate thenozzleportion of the;

head and the circumscribing sleeve on opposite si'd'es'o'f the rib,said.ribihavingiapainof ,ape'r tures formed ltl'ierethrough providingcommunication between said chambers, a coolant injector tube extendingbyway of one of thechambers through an aperture in the rib and communicating with the other oithe chambers, -a first con-. duit means coupled byway of theheadlto said tube, and asecond conduit means coupledjby way ofthe head to the other chamber whereby con tinuous coolant circulationmay be effected through the respective chambers,.a hollow supporting arm,for the instrument he'a'd, conduit means extending interiorly ofsaidarm and means coupling the conduits within the arm with the headconduits for circulation'of the coolant by way of'the arm to the head.

7.'An instrument mounting including a supportin'g'headihaving a bodyportion provided with an interior instrument receiving seat and atom--municating viewing tube, said 'hea'd having-"atapered nozzle portionforming the outer wall of the viewing tube, :said nozzle beinginteriorly formed .near the terminus thereof with "an cute; wardlyextendingperipheral rib, atapered sheath member circumscribing the bodyportion-of theheadl-andextending in spaced surrounding rela,

- tion to thenozzle portion of the body, said sheath interfitting withthe-rib on the nozzlelanduhav duit. coupled with .the circuitouspassage:- in one the circumscribingwsleeve.on opposite sides of therib,zsaid ribahavinga, .pair of apertures. formed therethroug-hprovidingcommunication between said zchambers,. a coolant. injector r tubeextending .by' way ofr-one of the chambers throu h-an; aperture intheribrand communicating with the,

other ofthe. chambers, a-first conduit'means .cou-

pled .by'wayotthehead to said tube, anda-sec ondjconduit meanscoupled-byway ofthe head=to the other g-chamber whereby continuous coolantcirculationr may be effected through, the respec: tive chambers, ahollow supporting-arm zforthe instrument.head, conduit means extendinginteriorly, ofsaid arm and means coupling the -;co-n-.

du-its Withinathe armwith. the head conduitsior circulation of i thecoolant by way of the arm to the head, a pivot interconnectingthe headand the arm, means providing an additional conduit within the arm, thehead having intercommunicating passages formed therein extending fromthe :pivotedyportion thereof to the interior of .thernozzle' portionofthe head, and the pivot having cc-nduitxpassages formed thereininterconnecting said last+mentioned l conduit means in the arm and theconduit passages in the-head;

when-the parts-are in assembled relation whereby a clearing blast may bedirected-intotthe interior, of the viewing tube by way of:thehollowfsupport ing arm'and-pivot.

An instrumentysupportin :head;-includingsa,

body portion having a pair of, supporting lugs,

therearound,- a, support for the headga pivot :extending through thelugs and engaging; thersupe port for pivotal connection of theparts,c;eaoh.-oi

said lugs having ,a circuitous passage formed therein extending aroundthe pivot-in spacedzrelationzzthereto and communicating at one end withthe nozzle surrounding-chamber, -a first. corrof .the .-lugsfox-introduction of coolant intojthe passageeandasecondconduit coupledwith the circuitous passage of the other lug to receive coolanttherefrom whereby circulated coolant will be effectivev as *respectsvbothithe lugs and coolant;

chamber of the head to minimizerthe heating thereof.

9. An instrument supportin head including=-abody portion having apair-0f supportinglugs,

and a nozzleportion providing a viewingrtubeaa sleeve circumscribingthenozzle portion irrspaced relation thereto to provide a coolantchamberduit. coupledwith the circuitous passagein one. of i thewlugs-*for. introduction, of coolant into the passage and :a a second:conduit coupled with the circuitous ,passage'of the other lug to:receive coolanttherefrom wherebycirculated coolant willbeefiective,asrrespectsboth the lugs and coolant chamberpfthe "head tominimize the heating-- thereof, a tubular supporting arm for the head, ajacket surrounding the arm in spaced relation thereto to provide a:circumscribing rcoolant o ive continuous circulation systemcircumscribing the supporting arm and the instrument supporting head isprovided.

10. An instrument support for protected presentation of a thermopile incooperative relation to a heated work piece or the like including asupporting head having an instrument receiving seat and a dependingnozzle portion adjacent the seat providing a viewing tube, a supportingarm for said head, and a pivot connecting the head to the arm forannular adjustment, said headhaving spaced walls providin a coolantchamber circumscribing the tube and laterally extending lugs spanningthe arm and engaging the pivot, the arm comprising a head portion, acap, and a sleeve interconnecting said head portion and cap, a pluralityof conduit tubes within the sleeve interconnectin the head portion andcap of the arm, a sleeve member circumscribing the first sleeve inspaced relation thereto and providing a circumscribing coolantcirculating chamber, said head portion of the arm having a plurality ofconduit passages formed therein communicating individually with saidconduit means and with said circumscribing chamber, each of the lugs ofthe instrument supporting head havin a circuitous coolant passage formedtherein communicating with the circumscribing coolant chamber of thenozzle, looped flexible conduits each connecting a passage in the headwith a passage in one oi the lugs, the head and one of the lugs havingan additional series of passages formed therein interconnecting the lugand the interior of the nozzle, and the head of the supporting arm andthe pivot having communicating passages formed therethroughcommunicating with said additional passages in the instrument supportinghead whereby a clearing blast may be connected through one of thecontained conduit means in the arm through said passages to the interiorof the instrument supporting head.

11. An instrument support for protected presentation of a thermopile incooperative relation to a heated work piece or the like including asupporting head having an instrument receiving seat and a dependinnozzle portion adjacent the seat providing a viewing tube, a supportinarm for said head, and a pivot connecting the head to the arm forannular adjustment, said head having spaced walls providing a coolantchamber circumscribing the tube and laterally extending lugs spanningthe arm and engaging the pivot, the arm comprising a head portion, acap, and a sleeve interconnecting said head portion and cap, a pluralityof conduit tubes within the sleeve interconnecting the head portion andcap of the arm, a sleeve member circumscribing the first sleeve inspaced relation thereto and provid ing a circumscribing coolantcirculatin chamber, said head portion of the arm havin a plurality ofconduit passages formed therein communicating individually with saidconduit means and with said circumscribing chamber, each of the lugs ofthe instrument supporting head having a circuitous coolant passageformed therein communicating with the circumscribing coolant chamber ofthe nozzle, looped flexible conduits each connecting a passage in thehead with a passage in one of the lugs, the head and one of the lugshaving an additional series of passages formed therein interconnectingthe lug and the interior of the nozzle, and the head of the supportingarm and the pivot having communicating passages formed therethroughcommunicating with said additional passages in the instrument supportinghead whereby a clearing blast may be connected through one of thecontained conduit means in the arm through said passages to the interiorof the instrument supporting head, said instrument supporting headhaving a transverse aperture formed in the upper portion thereof adaptedto receive an electrical conduit, the head of the supporting arm havinga kerf formed therein aligned with one of the passages thereof and inalignment with said passage in the instrument supporting head to permitlimited movement of an electrical conduit upon relative angular ad-J'ustment of the instrument supporting head and the arm.

CARL A. BOEI-IM.

REFERENCES CITED 7 The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,054,382 Larson Sept. 15, 19362,472,879 Bayle June 14, 1949

